Renuka Rajapakse

Enhanced index of refraction in four-wave-mixing media

Refractive index enhancement accompanied by vanishing absorption in a four-level atomic system interacting with two control and two probe fields in a regime of four-wave mixing (FWM) has been predicted and studied in the present work. We analyzed the maximal index enhancement in the four-level FWM system and gave index estimates for a real atomic gas of

Single-photon nonlinearities using arrays of cold polar molecules

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Electromagnetically induced transparency and slow light with n-doped GaAs

K, taking into account its multilevel structure and collisional and Doppler broadenings at large atomic densities. We also discussed how vanishing absorption with no nearby amplification can be realized in a two species system, consisting of a four-level FWM and a two-level system, where the latter provides additional absorption for one of the probe fields. We numerically estimated the index change in a system composed of

Bayesian inference to characterize Josephson oscillations in a double-well trap

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Studies of Negative Refraction Without Absorption

K and

Studies on Negative Refractive Index without Absorption

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Single Photon Nonlinearity in Cold Polar Molecular Arrays: Controlled Phase Operation

K gases.